which gas makes up more than 75% of the atmosphere?
A. Nitrogen
b. Water Vapor
c. argon
d. carbon dioxide

Answer:

it is true

Explanation:

that's the right answer

Answer: True. Hydrogen bonding is a dipole-dipole interaction and it is between water and another molecule.

Answer:

C and D

Explanation:

The answer is C and D

Answer:

The fairly positive hydrogen on one HF molecule will be attracted to one of these lone pairs on a nearby HF molecule. This is a hydrogen bond. Hydrogen bonds are attractions between a δ+ hydrogen on one molecule and a lone pair on a very electronegative atom (N, O or F) on another molecule.

Explanation:

Answer:

sediments are compacted and compressed under pressure

Answer:

i cant but ask awadtameem for help

Explanation:

Answer:

Multiply the molar amount by Avogadro's number.

Explanation:

Answer: Cellular Respiration

Explanation: Is the process in which the cells of living things break down the organic compound glucose with oxygen to produce carbon dioxide and water. The overall chemical equation for cellular respiration is:

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (stored in ATP)

Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.

Answer:

ZnS

Explanation:

Answer:

the chemical formula for zinc iii is ZnS

NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.

Recrystallization is a process of obtaining a pure solute by dissolving a solute in a solvent at high temperature and cooling the solution rapidly so that the pure solute can crystallize out of solution.

It is important to note that the solute must not react with the solution from which it is to be recrystallized. Unfortunately, NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.

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Answer:

The answer is Lyase

Explanation:

Any enzyme that catalyzes the addition or removal of the elements water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds, as defined in physiology. Decarboxylases, for example, remove carbon dioxide from amino acids, while dehydrases eliminate water.

Answer:

A → 16 protons

B → 16 neutrons

C → Sulfur

Explanation:

Remember, in a neutral atom the amount of protons is the same as the number of electrons. In the picture provided, its shown that there are 16 electrons which means there are 16 protons. Finding the amount of neutrons will be more tricky. The valence electron count will allow us to find this. The valence electrons will allows us to determine where it is on the periodic table (So does atomic number). The valence electron count is 6. So, using the current information (6 valence electrons and atomic number of 16) we can look at the periodic table and pinpoint which element it is. As you look, you'll find that the element sulfur matches the information. Since the element is sulfur, and it has an atomic mass of 32, we can subtract the atomic number from the atomic mass to find the amount of neutrons.

32 - 16 = 16

Thus, the atom in the picture is sulfur with an atomic number of 16, atomic mass of 32, and an electron count of 6.

Answer:

the answer should be d I'm pretty sure.

The number of mole in the container at 1.8 atm with a temperature of 270 K is 0.162 mole.

From the question given above, the following data were obtained:

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) = 2 L

Pressure (P) = 1.8 atm

Temperature (T) = 270 K

Using the ideal gas equation, we can obtain the number of mole in the container as illustrated below:

1.8 × 2 = n × 0.0821 × 270

3.6 = n × 22.167

Divide both side by 22.167

n = 3.6 / 22.167

Therefore, the number of mole in the container is 0.162 mole

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Answer:

Kinetic energy is the energy by ethicalness of article's movement while Thermal energy is the inner energy of an item because of the motor energy of its particles.

Explanation:

Answer:

Thermal energy:

Thermal energy is a type of energy that is formed by the vibration of atoms and molecules inside matter. The faster they vibrate, the more energy they contain. They also gain more heat.

Kinetic energy:

Kinetic energy is the mass/energy that is in moving objects. When an object speeds up, it gains more kinetic energy. All moving objects contain kinetic energy. The moving object gains energy due to its motion.

Note:

Sorry if this is a bad explanation but hopefully this helped!

Answer:

Lead is added to warm dilute nitric acid. When the carbonate has reacted with the warm acid, more carbonate is added until the carbonate is in excess.

Explanation:

Answer:

Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.

Explanation:

Answer:

1. Never leave the gas cartridge in the stove when you’re not using it.

2. Always wait until the stove cools down before you remove the gas cartridge.

3. Always try to store gas cartridges and camping stoves in a dry place

4. Clean your stove each time you have used it because it needs to be clean in order to perform at its best.

Answer: phosphoric acid, H3PO4 (gives pop a tart taste)

% O: 1 mol H3PO4 (4 mol O / 1 mol H3PO4) (16 g / 1 mol O) = (64 g O / 98 g H3PO4) x 100 = 65.3%

% P: 1 mol H3PO4 (1 mol P / 1 mol H3PO4) (31 g / 1 mol P) = (31 g P / 98 g H3PO4) x 100 = 31.6%

Gold (Au) in its bulk form, like the metal in a wedding ring, is not considered a magnetic material. ... This means that metallic gold has no unpaired electrons, and it does not display classical magnetism. Gold was one of the first metal known to man. Gold is most malleable and ductile of all metals.

Answer: D.Plants with large leaves have become common in rain forest

Explanation: I got this right on the test trust me

Answer:

D. Plants with large leaves have become common in rain forests

Explanation:

I got it correct. Be careful that sometimes the questions are in another order, so be guided by the sentence.

We will be left with 16g after 6years

The half-life of  radioactive isotopes refers to the amount of time it will take for half of the amount of the original isotope to decay.

it is calculated as

N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)

where,

N(t) = quantity of the substance remaining

N₀ = initial quantity of the substance

 t= time elapsed

t₁/₂ = half life of the substance

Given that:

The initial quantity is 1024g,

The half-life is 1year,

6 years is the time elapsed.

We have that

N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)

N(t)=1024([tex]\frac{1}{2}[/tex])^(6/1)

N(t)=1024([tex]\frac{1}{2}[/tex])⁶

N(t)=1024 x 0.015625

N(t)=16g

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Answer: 32g of sulfur, S, is 1 molar mass

1 molar mass contains X particles (in this case, atoms)

32g of oxygen, O2, is 1 molar mass

1 molar mass contains X particles (in this case, molecules)

There are 2 oxygen atoms in each molecule of O2 gas

Therefore, there are 2X atoms of oxygen in 32g of oxygen gas.

Explanation:  bcs yes

The value of x in the compound SOₓ is 3 . The compound is SO₃

The relative atomic mass of sulphur is given as 32

The relative atomic mass of oxygen is given as 16

The compound shown contains 80 g of sulphur and 120 g of oxygen.

The value of x can be calculated as follows:

molecular mass of S0ₓ = 32 + 16x

if 32 g of sulphur is in 32 + 16x of the of S0ₓ

80 g of sulphur is in 200 g of the compound

cross multiply

200(32) = 80(32 + 16x)

6400 = 2560 + 1280x

6400 - 2560 = 1280x

3840 = 1280x

x = 3840 / 1280

x = 3

Therefore, the compound is SO₃

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Answer:

Explanation:

As we know,

Answer:

In general an acid reacts with a carbonate or hydrogen-carbonate to produce a salt, carbon dioxide gas and water.

Answer:

[tex]\boxed {\boxed {\sf 63.57 \ mol }}[/tex]

Explanation:

We are asked to find how many moles of gas are in a sample.

At standard temperature and pressure (STP), any gas has a molar mass of 22.4 liters per mole. This means 1 mole of every gas at STP has a volume of 22.4 liters.

We will convert using dimensional analysis. Set up a conversion factor using the molar mass.

[tex]\frac {22.4 \ L }{1 \ mol }[/tex]

We are converting 1424 liters of gas to moles, so we multiply the conversion factor by this value.

[tex]1424 \ L *\frac {22.4 \ L }{1 \ mol }[/tex]

Flip the ratio so the units of liters cancel.

[tex]1424 \ L *\frac {1 \ mol }{22.4 \ L }[/tex]

[tex]1424 *\frac {1 \ mol }{22.4 }[/tex]

[tex]\frac {1 424}{22.4 } \ mol[/tex]

[tex]63.5714286 \ mol[/tex]

The original value of volume (1424 L) has 4 significant figures, so our answer must have the same. For the number we found, that is the hundredth place. The 1 in the thousandth place tells us to leave the 7 in the hundredth place.

[tex]63.57 \ mol[/tex]

There are approximately 63.57 moles of gas in a sample of 1424 liters.

By balancing the equation, it is obtained that 2 moles or 196 g of H₃PO₄ is required to react with 3 moles or 514.02 g of Ba(OH)₂. Thus, 0.685 g of H₃PO₄ reacts with 1.796 g Ba(OH)₂. The molarity of 1.796 g of Ba(OH)₂ in 46 ml is 0.217 molar.

Molarity of a solution is the ratio of the number of moles of solute to the volume of solution in liters. Molarity is the common term used to represent the concentration of the solution.

The balanced equation of the given reaction is written as:

[tex]\rm 2 H_{3}PO_{4} + 3Ba(OH)_{2} \rightarrow Ba_{3}(PO_{4})_{2} + 6H_{2}O[/tex]

As per this reaction, 2 moles of H₃PO₄ reacts with 3 moles of Ba(OH)₂.

Molar mass of  H₃PO₄  = 98 g/mol

2 moles = 2 × 98 = 196 g.

molar mass of Ba(OH)₂ = 171.3 g/mol

3 moles = 171.3 × 3 = 514.0 g.

The mass of Ba(OH)₂ produced from 0.685 g of H₃PO₄ is calculated as follows:

= (0.685 × 514 g) /196 g

= 1.796 g.

Number of moles of 1.796 g of Ba(OH)₂ = 1.796 g/ 171.3 g/mol = 0.010 mol

The volume of the solution is 46 ml or 0.046 L. Thus, molarity of the solution is = no.of moles/volume in L

                 = 0.010 moles/ 0.046 L

                 = 0.217 M.

Therefore, the molar concentration of Ba(OH)₂ is 0.217 M.

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Answer:

Cellular respiration and photosynthesis are direct opposite reactions. Energy from the sun enters a plant and is converted into glucose during photosynthesis. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat.

3.5 moles of a gas will occupy 2.7 L at 1.5 atm at a temperature of 14.1K

IDEAL GAS LAW:

PV = nRT

Where;

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Answer:

2.40 × 10² nm.

Explanation:

We are given that the the first ionization of a sodium atom is 5.00 × 10² kJ/mol and we want to determine the wavelength of light (in nm) that is sufficient to ionize a sodium atom.

We will first find the ionization energy required for one sodium atom using molar conversions:

[tex]\displaystyle 1 \text{ atom Na} \cdot \frac{5.00 \times 10^2\text{ kJ}}{\text{mol Na}} \cdot \frac{1\text{ mol Na}}{6.02\times 10^{23} \text{ atom Na}} = 8.31 \times 10^{-22} \text{ kJ}[/tex]

From the formula:

[tex]\displaystyle E = hv[/tex]

Where h is Planck's constant, substitute and solve for frequency v:

[tex]\displaystyle \begin{aligned} \left(8.31 \times 10^{-22} \text{ kJ}\right) &= (6.626\times 10^{-34} \text{J$\cdot$s})\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right) v \\ \\ v & = 1.25\times 10^{15} \text{ s}^{-1}\end{aligned}[/tex]

From the relationship between frequency and wavelength, solve for wavelength:

[tex]\displaystyle \begin{aligned} c & = \lambda\nu \\ \\ \lambda & = \frac{c}{v} \\ \\ & = \frac{(3.00 \times 10^8 \text{ ms}^{-1})}{(1.25 \times 10^{15}\text{ s}^{-1})}\cdot \left( \frac{1\times 10^9\text{ nm}}{1 \text{ m}}\right)\\ \\ &=2.40\times 10^2 \text{ nm} \end{aligned}[/tex]

In conclusion, the wavelength of light necessary to ionize a sodium ion is about 2.40 × 10² nm.